The stone walls are the most common structural elements
in older buildings. Beds made of stone
hewn, squared rubble or raw, they are exceptionally
bonded to the lead in the case of equipment or noble size
most often rigged a bed of lime mortar. In this latter
case, two types of seals could be identified: the "alive" joints,
close (less than 5 mm) shallow and wide joints.
Mortar joints stone walls are vulnerable to
weathering and especially water. Their permanent exhibition
causes them to wear depth, crumbling mortar
which can be accentuated by movements related to problems
Structural (bouffement, spill, cracking ...), and / or
growth of vegetation.
The method is to clean and fill the vacuum seals by
lime mortar. After the preparation phase (cleaning and
humidification media), it is to distinguish between two types
joints regards the composition and mortars
- 1 Reset damaged parts of the mortar. For cleaning
sharp joints, a fine tool is preferably used, type
blade, saw blade. To remove the mortar joints more
large, one can also use a chisel or carefully chisel
with a hammer. The resulting joint must have a depth and
a sufficient gripping surface to ensure good performance
the new O: about 20 mm deep for seals
alive, about 50 mm wide joints.
2 Clean and dust seals (eg with a brush
3 Sprinkle the joints with water to saturation, for
better the mortar.
1 For butt joints, mix about 1 part lime
white with two volumes of sand sifted end (0-2 mm).
2 For wide joints, mix about 1 part lime
white with three volumes of coarse sand (between 0-3 and 0-6 mm)
3 Add water to a consistency facilitating
application, more liquid in the case of butt joints, thicker
in the case of large volumes of joints.
The application of mortar:
1 In the case of large gaskets, projecting the trowel mortar
to fill the joints to bare siding. If the volume to
filling is too large, it may be useful to the file
stone fragments in the joint to reduce the volume of
mortar to use. However, be careful that
pieces do not protrude from the wall surface.
2 In the case of butt joints, filling joints using a
spatula, taking care to fill the joint to the bottom, without
3 After a minimum the mortar, we can, for the sake
contemporary aesthetics, choose to clean the stones
dry brush, then rinse with a damp sponge
4 A fashion trend is to deliver the stone
digging the joints, for an aesthetically poor result